No, you were not hit by a ban wave. that excuse is very silly because it implies Valve's system randomly bans people for fun.
I feel like you might have purchased the account, in hopes of selling the skins it came with.

The ban will NEVER be removed, your cunning plan to make a profit has failed.

https://steamhost.cn/steamcommunity_com/discussions/forum/9/3118150513208748117/

The answer will never change.

I'm sorry, but this is my account, and all the skins on it are also mine. I'm not trying to make any stupid excuses; I'm just telling you the truth. If I'm banned for no reason, it means that Valve's system is making mistakes, not me. If I were actually using cheats or other prohibited items, I wouldn't be trying to get support right now.

If you're such a smart person, then explain to me why I was banned from CS when I recently played, but then unbanned?

бан навсегда. играть можно на новом аккаунте

Oprindeligt skrevet af табуретка:

If you're such a smart person, then explain to me why I was banned from CS when I recently played, but then unbanned?

Your account was never unbanned. It's still there and active, now for nearly 2000 days.